summaryrefslogtreecommitdiff
path: root/util/ifdtool/ifdtool.c
blob: 2bf2f4d2660c088b566b636fa8c64259eb7061a4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
/*
 * ifdtool - dump Intel Firmware Descriptor information
 *
 * Copyright (C) 2011 The ChromiumOS Authors.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <getopt.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <commonlib/helpers.h>
#include <fmap.h>
#include "ifdtool.h"

#ifndef O_BINARY
#define O_BINARY 0
#endif

/**
 * PTR_IN_RANGE - examine whether a pointer falls in [base, base + limit)
 * @param ptr:    the non-void* pointer to a single arbitrary-sized object.
 * @param base:   base address represented with char* type.
 * @param limit:  upper limit of the legal address.
 *
 */
#define PTR_IN_RANGE(ptr, base, limit)			\
	((const char *)(ptr) >= (base) &&		\
	 (const char *)&(ptr)[1] <= (base) + (limit))

static int ifd_version;
static int chipset;
static unsigned int max_regions = 0;
static int selected_chip = 0;
static int platform = -1;

static const struct region_name region_names[MAX_REGIONS] = {
	{ "Flash Descriptor", "fd", "flashregion_0_flashdescriptor.bin", "SI_DESC" },
	{ "BIOS", "bios", "flashregion_1_bios.bin", "SI_BIOS" },
	{ "Intel ME", "me", "flashregion_2_intel_me.bin", "SI_ME" },
	{ "GbE", "gbe", "flashregion_3_gbe.bin", "SI_GBE" },
	{ "Platform Data", "pd", "flashregion_4_platform_data.bin", "SI_PDR" },
	{ "Reserved", "res1", "flashregion_5_reserved.bin", NULL },
	{ "Reserved", "res2", "flashregion_6_reserved.bin", NULL },
	{ "Reserved", "res3", "flashregion_7_reserved.bin", NULL },
	{ "EC", "ec", "flashregion_8_ec.bin", "SI_EC" },
};

/* port from flashrom */
static const char *const ich_chipset_names[] = {
	"Unknown ICH",
	"ICH",
	"ICH2345",
	"ICH6",
	"SCH U",
	"Atom E6xx",
	"Atom S1220 S1240 S1260",
	"ICH7",
	"ICH8",
	"ICH9",
	"ICH10",
	"5 series Ibex Peak",
	"6 series Cougar Point",
	"7 series Panther Point",
	"8 series Lynx Point",
	"Baytrail",
	"8 series Lynx Point LP",
	"8 series Wellsburg",
	"9 series Wildcat Point",
	"9 series Wildcat Point LP",
	"100 series Sunrise Point",
	"C620 series Lewisburg",
	NULL
};

static fdbar_t *find_fd(char *image, int size)
{
	int i, found = 0;

	/* Scan for FD signature */
	for (i = 0; i < (size - 4); i += 4) {
		if (*(uint32_t *) (image + i) == 0x0FF0A55A) {
			found = 1;
			break;	// signature found.
		}
	}

	if (!found) {
		printf("No Flash Descriptor found in this image\n");
		return NULL;
	}

	fdbar_t *fdb = (fdbar_t *) (image + i);
	return PTR_IN_RANGE(fdb, image, size) ? fdb : NULL;
}

static char *find_flumap(char *image, int size)
{
	/* The upper map is located in the word before the 256B-long OEM section
	 * at the end of the 4kB-long flash descriptor. In the official
	 * documentation this is defined as FDBAR + 0xEFC. However, starting
	 * with B-Step of Ibex Peak (5 series) the signature (and thus FDBAR)
	 * has moved 16 bytes back to offset 0x10 of the image. Although
	 * official documentation still maintains the offset relative to FDBAR
	 * this is wrong and a simple fixed offset from the start of the image
	 * works.
	*/
	char *flumap = image + 4096 - 256 - 4;
	return PTR_IN_RANGE(flumap, image, size) ? flumap : NULL;
}

static fcba_t *find_fcba(char *image, int size)
{
	fdbar_t *fdb = find_fd(image, size);
	if (!fdb)
		return NULL;
	fcba_t *fcba = (fcba_t *) (image + ((fdb->flmap0 & 0xff) << 4));
	return PTR_IN_RANGE(fcba, image, size) ? fcba : NULL;

}

static fmba_t *find_fmba(char *image, int size)
{
	fdbar_t *fdb = find_fd(image, size);
	if (!fdb)
		return NULL;
	fmba_t *fmba = (fmba_t *) (image + ((fdb->flmap1 & 0xff) << 4));
	return PTR_IN_RANGE(fmba, image, size) ? fmba : NULL;
}

static frba_t *find_frba(char *image, int size)
{
	fdbar_t *fdb = find_fd(image, size);
	if (!fdb)
		return NULL;
	frba_t *frba =
		(frba_t *) (image + (((fdb->flmap0 >> 16) & 0xff) << 4));
	return PTR_IN_RANGE(frba, image, size) ? frba : NULL;
}

static fpsba_t *find_fpsba(char *image, int size)
{
	fdbar_t *fdb = find_fd(image, size);
	if (!fdb)
		return NULL;
	fpsba_t *fpsba =
		(fpsba_t *) (image + (((fdb->flmap1 >> 16) & 0xff) << 4));
	return PTR_IN_RANGE(fpsba, image, size) ? fpsba : NULL;
}

static fmsba_t *find_fmsba(char *image, int size)
{
	fdbar_t *fdb = find_fd(image, size);
	if (!fdb)
		return NULL;
	fmsba_t *fmsba = (fmsba_t *) (image + ((fdb->flmap2 & 0xff) << 4));
	return PTR_IN_RANGE(fmsba, image, size) ? fmsba : NULL;
}

/* port from flashrom */
static enum ich_chipset guess_ich_chipset(const fdbar_t *fdb)
{
	uint32_t iccriba = (fdb->flmap2 >> 16) & 0xff;
	uint32_t msl = (fdb->flmap2 >> 8) & 0xff;
	uint32_t isl = (fdb->flmap1 >> 24);
	uint32_t nm = (fdb->flmap1 >> 8) & 0x7;

	if (iccriba == 0x00) {
		if (msl == 0 && isl <= 2)
			return CHIPSET_ICH8;
		else if (isl <= 2)
			return CHIPSET_ICH9;
		else if (isl <= 10)
			return CHIPSET_ICH10;
		else if (isl <= 16)
			return CHIPSET_5_SERIES_IBEX_PEAK;
		printf("Peculiar firmware descriptor, assuming Ibex Peak compatibility.\n");
		return CHIPSET_5_SERIES_IBEX_PEAK;
	} else if (iccriba < 0x31 && (fdb->flmap2 & 0xff) < 0x30) {
		if (msl == 0 && isl <= 17)
			return CHIPSET_BAYTRAIL;
		else if (msl <= 1 && isl <= 18)
			return CHIPSET_6_SERIES_COUGAR_POINT;
		else if (msl <= 1 && isl <= 21)
			return CHIPSET_8_SERIES_LYNX_POINT;
		printf("Peculiar firmware descriptor, assuming Wildcat Point compatibility.\n");
		return CHIPSET_9_SERIES_WILDCAT_POINT;
	} else if (nm == 6) {
		return CHIPSET_C620_SERIES_LEWISBURG;
	} else {
		return CHIPSET_100_SERIES_SUNRISE_POINT;
	}
}

/*
 * Some newer platforms have re-defined the FCBA field that was used to
 * distinguish IFD v1 v/s v2. Define a list of platforms that we know do not
 * have the required FCBA field, but are IFD v2 and return true if current
 * platform is one of them.
 */
static int is_platform_ifd_2(void)
{
	static const int ifd_2_platforms[] = {
		PLATFORM_GLK,
		PLATFORM_CNL,
		PLATFORM_ICL,
		PLATFORM_TGL,
		PLATFORM_JSL,
	};
	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(ifd_2_platforms); i++) {
		if (platform == ifd_2_platforms[i])
			return 1;
	}

	return 0;
}

/*
 * There is no version field in the descriptor so to determine
 * if this is a new descriptor format we check the hardcoded SPI
 * read frequency to see if it is fixed at 20MHz or 17MHz.
 */
static int get_ifd_version_from_fcba(char *image, int size)
{
	int read_freq;
	const fcba_t *fcba = find_fcba(image, size);
	const fdbar_t *fdb = find_fd(image, size);
	if (!fcba || !fdb)
		exit(EXIT_FAILURE);

	chipset = guess_ich_chipset(fdb);
	/* TODO: port ifd_version and max_regions
	 * against guess_ich_chipset()
	 */
	read_freq = (fcba->flcomp >> 17) & 7;

	switch (read_freq) {
	case SPI_FREQUENCY_20MHZ:
		return IFD_VERSION_1;
	case SPI_FREQUENCY_17MHZ:
	case SPI_FREQUENCY_50MHZ_30MHZ:
		return IFD_VERSION_2;
	default:
		fprintf(stderr, "Unknown descriptor version: %d\n",
			read_freq);
		exit(EXIT_FAILURE);
	}
}

static void check_ifd_version(char *image, int size)
{
	if (is_platform_ifd_2())
		ifd_version = IFD_VERSION_2;
	else
		ifd_version = get_ifd_version_from_fcba(image, size);

	if (ifd_version == IFD_VERSION_1)
		max_regions = MAX_REGIONS_OLD;
	else
		max_regions = MAX_REGIONS;
}

static region_t get_region(const frba_t *frba, unsigned int region_type)
{
	int base_mask;
	int limit_mask;
	uint32_t flreg;
	region_t region;

	if (ifd_version >= IFD_VERSION_2)
		base_mask = 0x7fff;
	else
		base_mask = 0xfff;

	limit_mask = base_mask << 16;

	if (region_type >= max_regions) {
		fprintf(stderr, "Invalid region type %d.\n", region_type);
		exit (EXIT_FAILURE);
	}

	flreg = frba->flreg[region_type];
	region.base = (flreg & base_mask) << 12;
	region.limit = ((flreg & limit_mask) >> 4) | 0xfff;
	region.size = region.limit - region.base + 1;

	if (region.size < 0)
		region.size = 0;

	return region;
}

static void set_region(frba_t *frba, unsigned int region_type,
		       const region_t *region)
{
	if (region_type >= max_regions) {
		fprintf(stderr, "Invalid region type %u.\n", region_type);
		exit (EXIT_FAILURE);
	}

	frba->flreg[region_type] =
		(((region->limit >> 12) & 0x7fff) << 16) |
		((region->base >> 12) & 0x7fff);
}

static const char *region_name(unsigned int region_type)
{
	if (region_type >= max_regions) {
		fprintf(stderr, "Invalid region type.\n");
		exit (EXIT_FAILURE);
	}

	return region_names[region_type].pretty;
}

static const char *region_name_short(unsigned int region_type)
{
	if (region_type >= max_regions) {
		fprintf(stderr, "Invalid region type.\n");
		exit (EXIT_FAILURE);
	}

	return region_names[region_type].terse;
}

static int region_num(const char *name)
{
	unsigned int i;

	for (i = 0; i < max_regions; i++) {
		if (strcasecmp(name, region_names[i].pretty) == 0)
			return i;
		if (strcasecmp(name, region_names[i].terse) == 0)
			return i;
	}

	return -1;
}

static const char *region_filename(unsigned int region_type)
{
	if (region_type >= max_regions) {
		fprintf(stderr, "Invalid region type %d.\n", region_type);
		exit (EXIT_FAILURE);
	}

	return region_names[region_type].filename;
}

static void dump_region(unsigned int num, const frba_t *frba)
{
	region_t region = get_region(frba, num);
	printf("  Flash Region %d (%s): %08x - %08x %s\n",
		       num, region_name(num), region.base, region.limit,
		       region.size < 1 ? "(unused)" : "");
}

static void dump_region_layout(char *buf, size_t bufsize, unsigned int num,
			       const frba_t *frba)
{
	region_t region = get_region(frba, num);
	snprintf(buf, bufsize, "%08x:%08x %s\n",
		region.base, region.limit, region_name_short(num));
}

static void dump_frba(const frba_t *frba)
{
	unsigned int i;
	printf("Found Region Section\n");
	for (i = 0; i < max_regions; i++) {
		printf("FLREG%u:    0x%08x\n", i, frba->flreg[i]);
		dump_region(i, frba);
	}
}

static void dump_frba_layout(const frba_t *frba, const char *layout_fname)
{
	char buf[LAYOUT_LINELEN];
	size_t bufsize = LAYOUT_LINELEN;
	unsigned int i;

	int layout_fd = open(layout_fname, O_WRONLY | O_CREAT | O_TRUNC,
			S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
	if (layout_fd == -1) {
		perror("Could not open file");
		exit(EXIT_FAILURE);
	}

	for (i = 0; i < max_regions; i++) {
		region_t region = get_region(frba, i);
		/* is region invalid? */
		if (region.size < 1)
			continue;

		dump_region_layout(buf, bufsize, i, frba);
		if (write(layout_fd, buf, strlen(buf)) < 0) {
			perror("Could not write to file");
			exit(EXIT_FAILURE);
		}
	}
	close(layout_fd);
	printf("Wrote layout to %s\n", layout_fname);
}

static void decode_spi_frequency(unsigned int freq)
{
	switch (freq) {
	case SPI_FREQUENCY_20MHZ:
		printf("20MHz");
		break;
	case SPI_FREQUENCY_33MHZ:
		printf("33MHz");
		break;
	case SPI_FREQUENCY_48MHZ:
		printf("48MHz");
		break;
	case SPI_FREQUENCY_50MHZ_30MHZ:
		switch (ifd_version) {
		case IFD_VERSION_1:
			printf("50MHz");
			break;
		case IFD_VERSION_2:
			printf("30MHz");
			break;
		}
		break;
	case SPI_FREQUENCY_17MHZ:
		printf("17MHz");
		break;
	default:
		printf("unknown<%x>MHz", freq);
	}
}

static void decode_component_density(unsigned int density)
{
	switch (density) {
	case COMPONENT_DENSITY_512KB:
		printf("512KB");
		break;
	case COMPONENT_DENSITY_1MB:
		printf("1MB");
		break;
	case COMPONENT_DENSITY_2MB:
		printf("2MB");
		break;
	case COMPONENT_DENSITY_4MB:
		printf("4MB");
		break;
	case COMPONENT_DENSITY_8MB:
		printf("8MB");
		break;
	case COMPONENT_DENSITY_16MB:
		printf("16MB");
		break;
	case COMPONENT_DENSITY_32MB:
		printf("32MB");
		break;
	case COMPONENT_DENSITY_64MB:
		printf("64MB");
		break;
	case COMPONENT_DENSITY_UNUSED:
		printf("UNUSED");
		break;
	default:
		printf("unknown<%x>MB", density);
	}
}

static void dump_fcba(const fcba_t *fcba)
{
	printf("\nFound Component Section\n");
	printf("FLCOMP     0x%08x\n", fcba->flcomp);
	printf("  Dual Output Fast Read Support:       %ssupported\n",
		(fcba->flcomp & (1 << 30))?"":"not ");
	printf("  Read ID/Read Status Clock Frequency: ");
	decode_spi_frequency((fcba->flcomp >> 27) & 7);
	printf("\n  Write/Erase Clock Frequency:         ");
	decode_spi_frequency((fcba->flcomp >> 24) & 7);
	printf("\n  Fast Read Clock Frequency:           ");
	decode_spi_frequency((fcba->flcomp >> 21) & 7);
	printf("\n  Fast Read Support:                   %ssupported",
		(fcba->flcomp & (1 << 20))?"":"not ");
	printf("\n  Read Clock Frequency:                ");
	decode_spi_frequency((fcba->flcomp >> 17) & 7);

	switch (ifd_version) {
	case IFD_VERSION_1:
		printf("\n  Component 2 Density:                 ");
		decode_component_density((fcba->flcomp >> 3) & 7);
		printf("\n  Component 1 Density:                 ");
		decode_component_density(fcba->flcomp & 7);
		break;
	case IFD_VERSION_2:
		printf("\n  Component 2 Density:                 ");
		decode_component_density((fcba->flcomp >> 4) & 0xf);
		printf("\n  Component 1 Density:                 ");
		decode_component_density(fcba->flcomp & 0xf);
		break;
	}

	printf("\n");
	printf("FLILL      0x%08x\n", fcba->flill);
	printf("  Invalid Instruction 3: 0x%02x\n",
		(fcba->flill >> 24) & 0xff);
	printf("  Invalid Instruction 2: 0x%02x\n",
		(fcba->flill >> 16) & 0xff);
	printf("  Invalid Instruction 1: 0x%02x\n",
		(fcba->flill >> 8) & 0xff);
	printf("  Invalid Instruction 0: 0x%02x\n",
		fcba->flill & 0xff);
	printf("FLPB       0x%08x\n", fcba->flpb);
	printf("  Flash Partition Boundary Address: 0x%06x\n\n",
		(fcba->flpb & 0xfff) << 12);
}

static void dump_fpsba(const fpsba_t *fpsba)
{
	unsigned int i;
	printf("Found PCH Strap Section\n");
	for (i = 0; i < ARRAY_SIZE(fpsba->pchstrp); i++)
		printf("PCHSTRP%u:%s 0x%08x\n", i,
		       i < 10 ? " " : "", fpsba->pchstrp[i]);

	if (ifd_version >= IFD_VERSION_2) {
		printf("HAP bit is %sset\n",
		       fpsba->pchstrp[0] & (1 << 16) ? "" : "not ");
	} else if (chipset >= CHIPSET_ICH8
		   && chipset <= CHIPSET_ICH10) {
		printf("ICH_MeDisable bit is %sset\n",
		       fpsba->pchstrp[0] & 1 ? "" : "not ");
	} else {
		printf("AltMeDisable bit is %sset\n",
		       fpsba->pchstrp[10] & (1 << 7) ? "" : "not ");
	}

	printf("\n");
}

static void decode_flmstr(uint32_t flmstr)
{
	int wr_shift, rd_shift;
	if (ifd_version >= IFD_VERSION_2) {
		wr_shift = FLMSTR_WR_SHIFT_V2;
		rd_shift = FLMSTR_RD_SHIFT_V2;
	} else {
		wr_shift = FLMSTR_WR_SHIFT_V1;
		rd_shift = FLMSTR_RD_SHIFT_V1;
	}

	/* EC region access only available on v2+ */
	if (ifd_version >= IFD_VERSION_2)
		printf("  EC Region Write Access:            %s\n",
		       (flmstr & (1 << (wr_shift + 8))) ?
		       "enabled" : "disabled");
	printf("  Platform Data Region Write Access: %s\n",
		(flmstr & (1 << (wr_shift + 4))) ? "enabled" : "disabled");
	printf("  GbE Region Write Access:           %s\n",
		(flmstr & (1 << (wr_shift + 3))) ? "enabled" : "disabled");
	printf("  Intel ME Region Write Access:      %s\n",
		(flmstr & (1 << (wr_shift + 2))) ? "enabled" : "disabled");
	printf("  Host CPU/BIOS Region Write Access: %s\n",
		(flmstr & (1 << (wr_shift + 1))) ? "enabled" : "disabled");
	printf("  Flash Descriptor Write Access:     %s\n",
		(flmstr & (1 << wr_shift)) ? "enabled" : "disabled");

	if (ifd_version >= IFD_VERSION_2)
		printf("  EC Region Read Access:             %s\n",
		       (flmstr & (1 << (rd_shift + 8))) ?
		       "enabled" : "disabled");
	printf("  Platform Data Region Read Access:  %s\n",
		(flmstr & (1 << (rd_shift + 4))) ? "enabled" : "disabled");
	printf("  GbE Region Read Access:            %s\n",
		(flmstr & (1 << (rd_shift + 3))) ? "enabled" : "disabled");
	printf("  Intel ME Region Read Access:       %s\n",
		(flmstr & (1 << (rd_shift + 2))) ? "enabled" : "disabled");
	printf("  Host CPU/BIOS Region Read Access:  %s\n",
		(flmstr & (1 << (rd_shift + 1))) ? "enabled" : "disabled");
	printf("  Flash Descriptor Read Access:      %s\n",
		(flmstr & (1 << rd_shift)) ? "enabled" : "disabled");

	/* Requestor ID doesn't exist for ifd 2 */
	if (ifd_version < IFD_VERSION_2)
		printf("  Requester ID:                      0x%04x\n\n",
			flmstr & 0xffff);
}

static void dump_fmba(const fmba_t *fmba)
{
	printf("Found Master Section\n");
	printf("FLMSTR1:   0x%08x (Host CPU/BIOS)\n", fmba->flmstr1);
	decode_flmstr(fmba->flmstr1);
	printf("FLMSTR2:   0x%08x (Intel ME)\n", fmba->flmstr2);
	decode_flmstr(fmba->flmstr2);
	printf("FLMSTR3:   0x%08x (GbE)\n", fmba->flmstr3);
	decode_flmstr(fmba->flmstr3);
	if (ifd_version >= IFD_VERSION_2) {
		printf("FLMSTR5:   0x%08x (EC)\n", fmba->flmstr5);
		decode_flmstr(fmba->flmstr5);
	}
}

static void dump_fmsba(const fmsba_t *fmsba)
{
	unsigned int i;
	printf("Found Processor Strap Section\n");
	for (i = 0; i < ARRAY_SIZE(fmsba->data); i++)
		printf("????:      0x%08x\n", fmsba->data[i]);

	if (chipset >= CHIPSET_ICH8 && chipset <= CHIPSET_ICH10) {
		printf("MCH_MeDisable bit is %sset\n",
		       fmsba->data[0] & 1 ? "" : "not ");
		printf("MCH_AltMeDisable bit is %sset\n",
		       fmsba->data[0] & (1 << 7) ? "" : "not ");
	}
}

static void dump_jid(uint32_t jid)
{
	printf("    SPI Componend Vendor ID:            0x%02x\n",
		jid & 0xff);
	printf("    SPI Componend Device ID 0:          0x%02x\n",
		(jid >> 8) & 0xff);
	printf("    SPI Componend Device ID 1:          0x%02x\n",
		(jid >> 16) & 0xff);
}

static void dump_vscc(uint32_t vscc)
{
	printf("    Lower Erase Opcode:                 0x%02x\n",
		vscc >> 24);
	printf("    Lower Write Enable on Write Status: 0x%02x\n",
		vscc & (1 << 20) ? 0x06 : 0x50);
	printf("    Lower Write Status Required:        %s\n",
		vscc & (1 << 19) ? "Yes" : "No");
	printf("    Lower Write Granularity:            %d bytes\n",
		vscc & (1 << 18) ? 64 : 1);
	printf("    Lower Block / Sector Erase Size:    ");
	switch ((vscc >> 16) & 0x3) {
	case 0:
		printf("256 Byte\n");
		break;
	case 1:
		printf("4KB\n");
		break;
	case 2:
		printf("8KB\n");
		break;
	case 3:
		printf("64KB\n");
		break;
	}

	printf("    Upper Erase Opcode:                 0x%02x\n",
		(vscc >> 8) & 0xff);
	printf("    Upper Write Enable on Write Status: 0x%02x\n",
		vscc & (1 << 4) ? 0x06 : 0x50);
	printf("    Upper Write Status Required:        %s\n",
		vscc & (1 << 3) ? "Yes" : "No");
	printf("    Upper Write Granularity:            %d bytes\n",
		vscc & (1 << 2) ? 64 : 1);
	printf("    Upper Block / Sector Erase Size:    ");
	switch (vscc & 0x3) {
	case 0:
		printf("256 Byte\n");
		break;
	case 1:
		printf("4KB\n");
		break;
	case 2:
		printf("8KB\n");
		break;
	case 3:
		printf("64KB\n");
		break;
	}
}

static void dump_vtba(const vtba_t *vtba, int vtl)
{
	int i;
	int max_len = sizeof(vtba_t)/sizeof(vscc_t);
	int num = (vtl >> 1) < max_len ? (vtl >> 1) : max_len;

	printf("ME VSCC table:\n");
	for (i = 0; i < num; i++) {
		printf("  JID%d:  0x%08x\n", i, vtba->entry[i].jid);
		dump_jid(vtba->entry[i].jid);
		printf("  VSCC%d: 0x%08x\n", i, vtba->entry[i].vscc);
		dump_vscc(vtba->entry[i].vscc);
	}
	printf("\n");
}

static void dump_oem(const uint8_t *oem)
{
	int i, j;
	printf("OEM Section:\n");
	for (i = 0; i < 4; i++) {
		printf("%02x:", i << 4);
		for (j = 0; j < 16; j++)
			printf(" %02x", oem[(i<<4)+j]);
		printf ("\n");
	}
	printf ("\n");
}

static void dump_fd(char *image, int size)
{
	const fdbar_t *fdb = find_fd(image, size);
	if (!fdb)
		exit(EXIT_FAILURE);

	printf("ICH Revision: %s\n", ich_chipset_names[chipset]);
	printf("FLMAP0:    0x%08x\n", fdb->flmap0);
	printf("  NR:      %d\n", (fdb->flmap0 >> 24) & 7);
	printf("  FRBA:    0x%x\n", ((fdb->flmap0 >> 16) & 0xff) << 4);
	printf("  NC:      %d\n", ((fdb->flmap0 >> 8) & 3) + 1);
	printf("  FCBA:    0x%x\n", ((fdb->flmap0) & 0xff) << 4);

	printf("FLMAP1:    0x%08x\n", fdb->flmap1);
	printf("  ISL:     0x%02x\n", (fdb->flmap1 >> 24) & 0xff);
	printf("  FPSBA:   0x%x\n", ((fdb->flmap1 >> 16) & 0xff) << 4);
	printf("  NM:      %d\n", (fdb->flmap1 >> 8) & 3);
	printf("  FMBA:    0x%x\n", ((fdb->flmap1) & 0xff) << 4);

	printf("FLMAP2:    0x%08x\n", fdb->flmap2);
	printf("  PSL:     0x%04x\n", (fdb->flmap2 >> 8) & 0xffff);
	printf("  FMSBA:   0x%x\n", ((fdb->flmap2) & 0xff) << 4);

	char *flumap = find_flumap(image, size);
	uint32_t flumap1 = *(uint32_t *)flumap;
	printf("FLUMAP1:   0x%08x\n", flumap1);
	printf("  Intel ME VSCC Table Length (VTL):        %d\n",
		(flumap1 >> 8) & 0xff);
	printf("  Intel ME VSCC Table Base Address (VTBA): 0x%06x\n\n",
		(flumap1 & 0xff) << 4);
	dump_vtba((vtba_t *)
			(image + ((flumap1 & 0xff) << 4)),
			(flumap1 >> 8) & 0xff);
	dump_oem((const uint8_t *)image + 0xf00);

	const frba_t *frba = find_frba(image, size);
	const fcba_t *fcba = find_fcba(image, size);
	const fpsba_t *fpsba = find_fpsba(image, size);
	const fmba_t *fmba = find_fmba(image, size);
	const fmsba_t *fmsba = find_fmsba(image, size);

	if (frba && fcba && fpsba && fmba && fmsba) {
		dump_frba(frba);
		dump_fcba(fcba);
		dump_fpsba(fpsba);
		dump_fmba(fmba);
		dump_fmsba(fmsba);
	} else {
		printf("FD is corrupted!\n");
	}
}

static void dump_layout(char *image, int size, const char *layout_fname)
{
	const frba_t *frba = find_frba(image, size);
	if (!frba)
		exit(EXIT_FAILURE);

	dump_frba_layout(frba, layout_fname);
}

static void write_regions(char *image, int size)
{
	unsigned int i;
	const frba_t *frba = find_frba(image, size);

	if (!frba)
		exit(EXIT_FAILURE);

	for (i = 0; i < max_regions; i++) {
		region_t region = get_region(frba, i);
		dump_region(i, frba);
		if (region.size > 0) {
			int region_fd;
			region_fd = open(region_filename(i),
					 O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
					 S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
			if (region_fd < 0) {
				perror("Error while trying to open file");
				exit(EXIT_FAILURE);
			}
			if (write(region_fd, image + region.base, region.size) != region.size)
				perror("Error while writing");
			close(region_fd);
		}
	}
}

static void validate_layout(char *image, int size)
{
	uint i, errors = 0;
	struct fmap *fmap;
	long int fmap_loc = fmap_find((uint8_t *)image, size);
	const frba_t *frba = find_frba(image, size);

	if (fmap_loc < 0 || !frba)
		exit(EXIT_FAILURE);

	fmap = (struct fmap *)(image + fmap_loc);

	for (i = 0; i < max_regions; i++) {
		if (region_names[i].fmapname == NULL)
			continue;

		region_t region = get_region(frba, i);

		if (region.size == 0)
			continue;

		const struct fmap_area *area =
			fmap_find_area(fmap, region_names[i].fmapname);

		if (!area)
			continue;

		if ((uint)region.base != area->offset ||
			(uint)region.size != area->size) {
			printf("Region mismatch between %s and %s\n",
				region_names[i].terse, area->name);
			printf(" Descriptor region %s:\n", region_names[i].terse);
			printf("  offset: 0x%08x\n", region.base);
			printf("  length: 0x%08x\n", region.size);
			printf(" FMAP area %s:\n", area->name);
			printf("  offset: 0x%08x\n", area->offset);
			printf("  length: 0x%08x\n", area->size);
			errors++;
		}
	}

	if (errors > 0)
		exit(EXIT_FAILURE);
}

static void write_image(const char *filename, char *image, int size)
{
	char new_filename[FILENAME_MAX]; // allow long file names
	int new_fd;

	// - 5: leave room for ".new\0"
	strncpy(new_filename, filename, FILENAME_MAX - 5);
	strncat(new_filename, ".new", FILENAME_MAX - strlen(filename));

	printf("Writing new image to %s\n", new_filename);

	// Now write out new image
	new_fd = open(new_filename,
			 O_WRONLY | O_CREAT | O_TRUNC | O_BINARY,
			 S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
	if (new_fd < 0) {
		perror("Error while trying to open file");
		exit(EXIT_FAILURE);
	}
	if (write(new_fd, image, size) != size)
		perror("Error while writing");
	close(new_fd);
}

static void set_spi_frequency(const char *filename, char *image, int size,
			      enum spi_frequency freq)
{
	fcba_t *fcba = find_fcba(image, size);
	if (!fcba)
		exit(EXIT_FAILURE);

	/* clear bits 21-29 */
	fcba->flcomp &= ~0x3fe00000;
	/* Read ID and Read Status Clock Frequency */
	fcba->flcomp |= freq << 27;
	/* Write and Erase Clock Frequency */
	fcba->flcomp |= freq << 24;
	/* Fast Read Clock Frequency */
	fcba->flcomp |= freq << 21;

	write_image(filename, image, size);
}

static void set_em100_mode(const char *filename, char *image, int size)
{
	fcba_t *fcba = find_fcba(image, size);
	if (!fcba)
		exit(EXIT_FAILURE);

	int freq;

	switch (ifd_version) {
	case IFD_VERSION_1:
		freq = SPI_FREQUENCY_20MHZ;
		break;
	case IFD_VERSION_2:
		freq = SPI_FREQUENCY_17MHZ;
		break;
	default:
		freq = SPI_FREQUENCY_17MHZ;
		break;
	}

	fcba->flcomp &= ~(1 << 30);
	set_spi_frequency(filename, image, size, freq);
}

static void set_chipdensity(const char *filename, char *image, int size,
                            unsigned int density)
{
	fcba_t *fcba = find_fcba(image, size);
	uint8_t mask, chip2_offset;
	if (!fcba)
		exit(EXIT_FAILURE);

	printf("Setting chip density to ");
	decode_component_density(density);
	printf("\n");

	switch (ifd_version) {
	case IFD_VERSION_1:
		/* fail if selected density is not supported by this version */
		if ( (density == COMPONENT_DENSITY_32MB) ||
		     (density == COMPONENT_DENSITY_64MB) ||
		     (density == COMPONENT_DENSITY_UNUSED) ) {
			printf("error: Selected density not supported in IFD version 1.\n");
			exit(EXIT_FAILURE);
		}
		mask = 0x7;
		chip2_offset = 3;
		break;
	case IFD_VERSION_2:
		mask = 0xf;
		chip2_offset = 4;
		break;
	default:
		printf("error: Unknown IFD version\n");
		exit(EXIT_FAILURE);
		break;
	}

	/* clear chip density for corresponding chip */
	switch (selected_chip) {
	case 1:
		fcba->flcomp &= ~mask;
		break;
	case 2:
		fcba->flcomp &= ~(mask << chip2_offset);
		break;
	default: /*both chips*/
		fcba->flcomp &= ~(mask | (mask << chip2_offset));
		break;
	}

	/* set the new density */
	if (selected_chip == 1 || selected_chip == 0)
		fcba->flcomp |= (density); /* first chip */
	if (selected_chip == 2 || selected_chip == 0)
		fcba->flcomp |= (density << chip2_offset); /* second chip */

	write_image(filename, image, size);
}

static int check_region(const frba_t *frba, unsigned int region_type)
{
	region_t region;

	if (!frba)
		return 0;

	region = get_region(frba, region_type);
	return !!((region.base < region.limit) && (region.size > 0));
}

static void lock_descriptor(const char *filename, char *image, int size)
{
	int wr_shift, rd_shift;
	fmba_t *fmba = find_fmba(image, size);
	const frba_t *frba = find_frba(image, size);
	if (!fmba)
		exit(EXIT_FAILURE);

	if (ifd_version >= IFD_VERSION_2) {
		wr_shift = FLMSTR_WR_SHIFT_V2;
		rd_shift = FLMSTR_RD_SHIFT_V2;

		/* Clear non-reserved bits */
		fmba->flmstr1 &= 0xff;
		fmba->flmstr2 &= 0xff;
		fmba->flmstr3 &= 0xff;
		fmba->flmstr5 &= 0xff;
	} else {
		wr_shift = FLMSTR_WR_SHIFT_V1;
		rd_shift = FLMSTR_RD_SHIFT_V1;

		fmba->flmstr1 = 0;
		fmba->flmstr2 = 0;
		/* Requestor ID */
		fmba->flmstr3 = 0x118;
	}

	switch (platform) {
	case PLATFORM_APL:
	case PLATFORM_GLK:
		/* CPU/BIOS can read descriptor and BIOS */
		fmba->flmstr1 |= 0x3 << rd_shift;
		/* CPU/BIOS can write BIOS */
		fmba->flmstr1 |= 0x2 << wr_shift;
		/* TXE can read descriptor, BIOS and Device Expansion */
		fmba->flmstr2 |= 0x23 << rd_shift;
		/* TXE can only write Device Expansion */
		fmba->flmstr2 |= 0x20 << wr_shift;
		break;
	case PLATFORM_CNL:
	case PLATFORM_ICL:
	case PLATFORM_SKLKBL:
	case PLATFORM_TGL:
		/* CPU/BIOS can read descriptor and BIOS. */
		fmba->flmstr1 |= (1 << REGION_DESC) << rd_shift;
		fmba->flmstr1 |= (1 << REGION_BIOS) << rd_shift;
		/* CPU/BIOS can write BIOS. */
		fmba->flmstr1 |= (1 << REGION_BIOS) << wr_shift;
		/* ME can read descriptor and ME. */
		fmba->flmstr2 |= (1 << REGION_DESC) << rd_shift;
		fmba->flmstr2 |= (1 << REGION_ME) << rd_shift;
		/* ME can write ME. */
		fmba->flmstr2 |= (1 << REGION_ME) << wr_shift;
		if (check_region(frba, REGION_GBE)) {
			/* BIOS can read/write GbE. */
			fmba->flmstr1 |= (1 << REGION_GBE) << rd_shift;
			fmba->flmstr1 |= (1 << REGION_GBE) << wr_shift;
			/* ME can read GbE. */
			fmba->flmstr2 |= (1 << REGION_GBE) << rd_shift;
			/* GbE can read descriptor and read/write GbE.. */
			fmba->flmstr3 |= (1 << REGION_DESC) << rd_shift;
			fmba->flmstr3 |= (1 << REGION_GBE) << rd_shift;
			fmba->flmstr3 |= (1 << REGION_GBE) << wr_shift;
		}
		if (check_region(frba, REGION_PDR)) {
			/* BIOS can read/write PDR. */
			fmba->flmstr1 |= (1 << REGION_PDR) << rd_shift;
			fmba->flmstr1 |= (1 << REGION_PDR) << wr_shift;
		}
		if (check_region(frba, REGION_EC)) {
			/* BIOS can read EC. */
			fmba->flmstr1 |= (1 << REGION_EC) << rd_shift;
			/* EC can read descriptor and read/write EC. */
			fmba->flmstr5 |= (1 << REGION_DESC) << rd_shift;
			fmba->flmstr5 |= (1 << REGION_EC) << rd_shift;
			fmba->flmstr5 |= (1 << REGION_EC) << wr_shift;
		}
		break;
	default:
		/* CPU/BIOS can read descriptor and BIOS. */
		fmba->flmstr1 |= (1 << REGION_DESC) << rd_shift;
		fmba->flmstr1 |= (1 << REGION_BIOS) << rd_shift;
		/* CPU/BIOS can write BIOS. */
		fmba->flmstr1 |= (1 << REGION_BIOS) << wr_shift;
		/* ME can read descriptor and ME. */
		fmba->flmstr2 |= (1 << REGION_DESC) << rd_shift;
		fmba->flmstr2 |= (1 << REGION_ME) << rd_shift;
		/* ME can write ME. */
		fmba->flmstr2 |= (1 << REGION_ME) << wr_shift;
		if (check_region(frba, REGION_GBE)) {
			/* BIOS can read GbE. */
			fmba->flmstr1 |= (1 << REGION_GBE) << rd_shift;
			/* BIOS can write GbE. */
			fmba->flmstr1 |= (1 << REGION_GBE) << wr_shift;
			/* ME can read GbE. */
			fmba->flmstr2 |= (1 << REGION_GBE) << rd_shift;
			/* ME can write GbE. */
			fmba->flmstr2 |= (1 << REGION_GBE) << wr_shift;
			/* GbE can write GbE. */
			fmba->flmstr3 |= (1 << REGION_GBE) << rd_shift;
			/* GbE can read GbE. */
			fmba->flmstr3 |= (1 << REGION_GBE) << wr_shift;
		}
		break;
	}

	write_image(filename, image, size);
}

static void unlock_descriptor(const char *filename, char *image, int size)
{
	fmba_t *fmba = find_fmba(image, size);
	if (!fmba)
		exit(EXIT_FAILURE);

	if (ifd_version >= IFD_VERSION_2) {
		/* Access bits for each region are read: 19:8 write: 31:20 */
		fmba->flmstr1 = 0xffffff00 | (fmba->flmstr1 & 0xff);
		fmba->flmstr2 = 0xffffff00 | (fmba->flmstr2 & 0xff);
		fmba->flmstr3 = 0xffffff00 | (fmba->flmstr3 & 0xff);
		fmba->flmstr5 = 0xffffff00 | (fmba->flmstr5 & 0xff);
	} else {
		fmba->flmstr1 = 0xffff0000;
		fmba->flmstr2 = 0xffff0000;
		/* Keep chipset specific Requester ID */
		fmba->flmstr3 = 0x08080000 | (fmba->flmstr3 & 0xffff);
	}

	write_image(filename, image, size);
}

/* Set the AltMeDisable (or HAP for >= IFD_VERSION_2) */
static void fpsba_set_altmedisable(fpsba_t *fpsba, fmsba_t *fmsba, bool altmedisable)
{
	if (ifd_version >= IFD_VERSION_2) {
		printf("%sting the HAP bit to %s Intel ME...\n",
		      altmedisable?"Set":"Unset",
		      altmedisable?"disable":"enable");
		if (altmedisable)
			fpsba->pchstrp[0] |= (1 << 16);
		else
			fpsba->pchstrp[0] &= ~(1 << 16);
	} else {
		if (chipset >= CHIPSET_ICH8 && chipset <= CHIPSET_ICH10) {
			printf("%sting the ICH_MeDisable, MCH_MeDisable, "
			       "and MCH_AltMeDisable to %s Intel ME...\n",
			       altmedisable?"Set":"Unset",
			       altmedisable?"disable":"enable");
			if (altmedisable) {
				/* MCH_MeDisable */
				fmsba->data[0] |= 1;
				/* MCH_AltMeDisable */
				fmsba->data[0] |= (1 << 7);
				/* ICH_MeDisable */
				fpsba->pchstrp[0] |= 1;
			} else {
				fmsba->data[0] &= ~1;
				fmsba->data[0] &= ~(1 << 7);
				fpsba->pchstrp[0] &= ~1;
			}
		} else {
			printf("%sting the AltMeDisable to %s Intel ME...\n",
			       altmedisable?"Set":"Unset",
			       altmedisable?"disable":"enable");
			if (altmedisable)
				fpsba->pchstrp[10] |= (1 << 7);
			else
				fpsba->pchstrp[10] &= ~(1 << 7);
		}
	}
}

static void inject_region(const char *filename, char *image, int size,
		   unsigned int region_type, const char *region_fname)
{
	frba_t *frba = find_frba(image, size);
	if (!frba)
		exit(EXIT_FAILURE);

	region_t region = get_region(frba, region_type);
	if (region.size <= 0xfff) {
		fprintf(stderr, "Region %s is disabled in target. Not injecting.\n",
				region_name(region_type));
		exit(EXIT_FAILURE);
	}

	int region_fd = open(region_fname, O_RDONLY | O_BINARY);
	if (region_fd == -1) {
		perror("Could not open file");
		exit(EXIT_FAILURE);
	}
	struct stat buf;
	if (fstat(region_fd, &buf) == -1) {
		perror("Could not stat file");
		exit(EXIT_FAILURE);
	}
	int region_size = buf.st_size;

	printf("File %s is %d bytes\n", region_fname, region_size);

	if ( (region_size > region.size) || ((region_type != 1) &&
		(region_size > region.size))) {
		fprintf(stderr, "Region %s is %d(0x%x) bytes. File is %d(0x%x)"
				" bytes. Not injecting.\n",
				region_name(region_type), region.size,
				region.size, region_size, region_size);
		exit(EXIT_FAILURE);
	}

	int offset = 0;
	if ((region_type == 1) && (region_size < region.size)) {
		fprintf(stderr, "Region %s is %d(0x%x) bytes. File is %d(0x%x)"
				" bytes. Padding before injecting.\n",
				region_name(region_type), region.size,
				region.size, region_size, region_size);
		offset = region.size - region_size;
		memset(image + region.base, 0xff, offset);
	}

	if (size < region.base + offset + region_size) {
		fprintf(stderr, "Output file is too small. (%d < %d)\n",
			size, region.base + offset + region_size);
		exit(EXIT_FAILURE);
	}

	if (read(region_fd, image + region.base + offset, region_size)
							!= region_size) {
		perror("Could not read file");
		exit(EXIT_FAILURE);
	}

	close(region_fd);

	printf("Adding %s as the %s section of %s\n",
	       region_fname, region_name(region_type), filename);
	write_image(filename, image, size);
}

static unsigned int next_pow2(unsigned int x)
{
	unsigned int y = 1;
	if (x == 0)
		return 0;
	while (y <= x)
		y = y << 1;

	return y;
}

/**
 * Determine if two memory regions overlap.
 *
 * @param r1, r2 Memory regions to compare.
 * @return 0 if the two regions are separate
 * @return 1 if the two regions overlap
 */
static int regions_collide(const region_t *r1, const region_t *r2)
{
	if ((r1->size == 0) || (r2->size == 0))
		return 0;

	/* r1 should be either completely below or completely above r2 */
	return !(r1->limit < r2->base || r1->base > r2->limit);
}

static void new_layout(const char *filename, char *image, int size,
		const char *layout_fname)
{
	FILE *romlayout;
	char tempstr[256];
	char layout_region_name[256];
	unsigned int i, j;
	int region_number;
	region_t current_regions[MAX_REGIONS];
	region_t new_regions[MAX_REGIONS];
	int new_extent = 0;
	char *new_image;

	/* load current descriptor map and regions */
	frba_t *frba = find_frba(image, size);
	if (!frba)
		exit(EXIT_FAILURE);

	for (i = 0; i < max_regions; i++) {
		current_regions[i] = get_region(frba, i);
		new_regions[i] = get_region(frba, i);
	}

	/* read new layout */
	romlayout = fopen(layout_fname, "r");

	if (!romlayout) {
		perror("Could not read layout file.\n");
		exit(EXIT_FAILURE);
	}

	while (!feof(romlayout)) {
		char *tstr1, *tstr2;

		if (2 != fscanf(romlayout, "%255s %255s\n", tempstr,
					layout_region_name))
			continue;

		region_number = region_num(layout_region_name);
		if (region_number < 0)
			continue;

		tstr1 = strtok(tempstr, ":");
		tstr2 = strtok(NULL, ":");
		if (!tstr1 || !tstr2) {
			fprintf(stderr, "Could not parse layout file.\n");
			exit(EXIT_FAILURE);
		}
		new_regions[region_number].base = strtol(tstr1,
				(char **)NULL, 16);
		new_regions[region_number].limit = strtol(tstr2,
				(char **)NULL, 16);
		new_regions[region_number].size =
			new_regions[region_number].limit -
			new_regions[region_number].base + 1;

		if (new_regions[region_number].size < 0)
			new_regions[region_number].size = 0;
	}
	fclose(romlayout);

	/* check new layout */
	for (i = 0; i < max_regions; i++) {
		if (new_regions[i].size == 0)
			continue;

		if (new_regions[i].size < current_regions[i].size) {
			printf("DANGER: Region %s is shrinking.\n",
					region_name(i));
			printf("    The region will be truncated to fit.\n");
			printf("    This may result in an unusable image.\n");
		}

		for (j = i + 1; j < max_regions; j++) {
			if (regions_collide(&new_regions[i], &new_regions[j])) {
				fprintf(stderr, "Regions would overlap.\n");
				exit(EXIT_FAILURE);
			}
		}

		/* detect if the image size should grow */
		if (new_extent < new_regions[i].limit)
			new_extent = new_regions[i].limit;
	}

	/* check if the image is actually a Flash Descriptor region */
	if (size == new_regions[0].size) {
		printf("The image is a single Flash Descriptor:\n");
		printf("    Only the descriptor will be modified\n");
		new_extent = size;
	} else {
		new_extent = next_pow2(new_extent - 1);
		if (new_extent != size) {
			printf("The image has changed in size.\n");
			printf("The old image is %d bytes.\n", size);
			printf("The new image is %d bytes.\n", new_extent);
		}
	}

	/* copy regions to a new image */
	new_image = malloc(new_extent);
	memset(new_image, 0xff, new_extent);
	for (i = 0; i < max_regions; i++) {
		int copy_size = new_regions[i].size;
		int offset_current = 0, offset_new = 0;
		const region_t *current = &current_regions[i];
		const region_t *new = &new_regions[i];

		if (new->size == 0)
			continue;

		if (new->size > current->size) {
			/* copy from the end of the current region */
			copy_size = current->size;
			if (i == REGION_BIOS)
				offset_new = new->size - current->size;
		}

		if ((i == REGION_BIOS) && (new->size < current->size)) {
			/* copy BIOS region to the end of the new region */
			offset_current = current->size - new->size;
		}

		if (size < current->base + offset_current + copy_size) {
			printf("Skip descriptor %d (%s) (region missing in the old image)\n", i,
				region_name(i));
			continue;
		};

		printf("Copy Descriptor %d (%s) (%d bytes)\n", i,
				region_name(i), copy_size);
		printf("   from %08x+%08x:%08x (%10d)\n", current->base,
				offset_current, current->limit, current->size);
		printf("     to %08x+%08x:%08x (%10d)\n", new->base,
				offset_new, new->limit, new->size);

		memcpy(new_image + new->base + offset_new,
				image + current->base + offset_current,
				copy_size);
	}

	/* update new descriptor regions */
	frba = find_frba(new_image, new_extent);
	if (!frba)
		exit(EXIT_FAILURE);

	printf("Modify Flash Descriptor regions\n");
	for (i = 1; i < max_regions; i++)
		set_region(frba, i, &new_regions[i]);

	write_image(filename, new_image, new_extent);
	free(new_image);
}

static void print_version(void)
{
	printf("ifdtool v%s -- ", IFDTOOL_VERSION);
	printf("Copyright (C) 2011 Google Inc.\n\n");
	printf
	    ("This program is free software: you can redistribute it and/or modify\n"
	     "it under the terms of the GNU General Public License as published by\n"
	     "the Free Software Foundation, version 2 of the License.\n\n"
	     "This program is distributed in the hope that it will be useful,\n"
	     "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
	     "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
	     "GNU General Public License for more details.\n\n");
}

static void print_usage(const char *name)
{
	printf("usage: %s [-vhdix?] <filename>\n", name);
	printf("\n"
	       "   -d | --dump:                          dump intel firmware descriptor\n"
	       "   -f | --layout <filename>              dump regions into a flashrom layout file\n"
	       "   -t | --validate                       Validate that the firmware descriptor layout matches the fmap layout\n"
	       "   -x | --extract:                       extract intel fd modules\n"
	       "   -i | --inject <region>:<module>       inject file <module> into region <region>\n"
	       "   -n | --newlayout <filename>           update regions using a flashrom layout file\n"
	       "   -s | --spifreq <17|20|30|33|48|50>    set the SPI frequency\n"
	       "   -D | --density <512|1|2|4|8|16|32|64> set chip density (512 in KByte, others in MByte)\n"
	       "   -C | --chip <0|1|2>                   select spi chip on which to operate\n"
	       "                                         can only be used once per run:\n"
	       "                                         0 - both chips (default), 1 - first chip, 2 - second chip\n"
	       "   -e | --em100                          set SPI frequency to 20MHz and disable\n"
	       "                                         Dual Output Fast Read Support\n"
	       "   -l | --lock                           Lock firmware descriptor and ME region\n"
	       "   -u | --unlock                         Unlock firmware descriptor and ME region\n"
	       "   -M | --altmedisable <0|1>             Set the AltMeDisable (or HAP for skylake or newer platform)\n"
	       "                                         bit to disable ME\n"
	       "   -p | --platform                       Add platform-specific quirks\n"
	       "                                         aplk - Apollo Lake\n"
	       "                                         cnl - Cannon Lake\n"
	       "                                         glk - Gemini Lake\n"
	       "                                         sklkbl - Skylake/Kaby Lake\n"
	       "   -v | --version:                       print the version\n"
	       "   -h | --help:                          print this help\n\n"
	       "<region> is one of Descriptor, BIOS, ME, GbE, Platform\n"
	       "\n");
}

int main(int argc, char *argv[])
{
	int opt, option_index = 0;
	int mode_dump = 0, mode_extract = 0, mode_inject = 0, mode_spifreq = 0;
	int mode_em100 = 0, mode_locked = 0, mode_unlocked = 0, mode_validate = 0;
	int mode_layout = 0, mode_newlayout = 0, mode_density = 0;
	int mode_altmedisable = 0, altmedisable = 0;
	char *region_type_string = NULL, *region_fname = NULL;
	const char *layout_fname = NULL;
	int region_type = -1, inputfreq = 0;
	unsigned int new_density = 0;
	enum spi_frequency spifreq = SPI_FREQUENCY_20MHZ;

	static const struct option long_options[] = {
		{"dump", 0, NULL, 'd'},
		{"layout", 1, NULL, 'f'},
		{"extract", 0, NULL, 'x'},
		{"inject", 1, NULL, 'i'},
		{"newlayout", 1, NULL, 'n'},
		{"spifreq", 1, NULL, 's'},
		{"density", 1, NULL, 'D'},
		{"chip", 1, NULL, 'C'},
		{"altmedisable", 1, NULL, 'M'},
		{"em100", 0, NULL, 'e'},
		{"lock", 0, NULL, 'l'},
		{"unlock", 0, NULL, 'u'},
		{"version", 0, NULL, 'v'},
		{"help", 0, NULL, 'h'},
		{"platform", 0, NULL, 'p'},
		{"validate", 0, NULL, 't'},
		{0, 0, 0, 0}
	};

	while ((opt = getopt_long(argc, argv, "df:D:C:M:xi:n:s:p:eluvth?",
				  long_options, &option_index)) != EOF) {
		switch (opt) {
		case 'd':
			mode_dump = 1;
			break;
		case 'f':
			mode_layout = 1;
			layout_fname = strdup(optarg);
			if (!layout_fname) {
				fprintf(stderr, "No layout file specified\n");
				print_usage(argv[0]);
				exit(EXIT_FAILURE);
			}
			break;
		case 'x':
			mode_extract = 1;
			break;
		case 'i':
			// separate type and file name
			region_type_string = strdup(optarg);
			region_fname = strchr(region_type_string, ':');
			if (!region_fname) {
				print_usage(argv[0]);
				exit(EXIT_FAILURE);
			}
			region_fname[0] = '\0';
			region_fname++;
			// Descriptor, BIOS, ME, GbE, Platform
			// valid type?
			if (!strcasecmp("Descriptor", region_type_string))
				region_type = 0;
			else if (!strcasecmp("BIOS", region_type_string))
				region_type = 1;
			else if (!strcasecmp("ME", region_type_string))
				region_type = 2;
			else if (!strcasecmp("GbE", region_type_string))
				region_type = 3;
			else if (!strcasecmp("Platform", region_type_string))
				region_type = 4;
			else if (!strcasecmp("EC", region_type_string))
				region_type = 8;
			if (region_type == -1) {
				fprintf(stderr, "No such region type: '%s'\n\n",
					region_type_string);
				print_usage(argv[0]);
				exit(EXIT_FAILURE);
			}
			mode_inject = 1;
			break;
		case 'n':
			mode_newlayout = 1;
			layout_fname = strdup(optarg);
			if (!layout_fname) {
				fprintf(stderr, "No layout file specified\n");
				print_usage(argv[0]);
				exit(EXIT_FAILURE);
			}
			break;
		case 'D':
			mode_density = 1;
			new_density = strtoul(optarg, NULL, 0);
			switch (new_density) {
			case 512:
				new_density = COMPONENT_DENSITY_512KB;
				break;
			case 1:
				new_density = COMPONENT_DENSITY_1MB;
				break;
			case 2:
				new_density = COMPONENT_DENSITY_2MB;
				break;
			case 4:
				new_density = COMPONENT_DENSITY_4MB;
				break;
			case 8:
				new_density = COMPONENT_DENSITY_8MB;
				break;
			case 16:
				new_density = COMPONENT_DENSITY_16MB;
				break;
			case 32:
				new_density = COMPONENT_DENSITY_32MB;
				break;
			case 64:
				new_density = COMPONENT_DENSITY_64MB;
				break;
			case 0:
				new_density = COMPONENT_DENSITY_UNUSED;
				break;
			default:
				printf("error: Unknown density\n");
				print_usage(argv[0]);
				exit(EXIT_FAILURE);
			}
			break;
		case 'C':
			selected_chip = strtol(optarg, NULL, 0);
			if (selected_chip > 2) {
				fprintf(stderr, "error: Invalid chip selection\n");
				print_usage(argv[0]);
				exit(EXIT_FAILURE);
			}
			break;
		case 'M':
			mode_altmedisable = 1;
			altmedisable = strtol(optarg, NULL, 0);
			if (altmedisable > 1) {
				fprintf(stderr, "error: Illegal value\n");
				print_usage(argv[0]);
				exit(EXIT_FAILURE);
			}
			break;
		case 's':
			// Parse the requested SPI frequency
			inputfreq = strtol(optarg, NULL, 0);
			switch (inputfreq) {
			case 17:
				spifreq = SPI_FREQUENCY_17MHZ;
				break;
			case 20:
				spifreq = SPI_FREQUENCY_20MHZ;
				break;
			case 30:
				spifreq = SPI_FREQUENCY_50MHZ_30MHZ;
				break;
			case 33:
				spifreq = SPI_FREQUENCY_33MHZ;
				break;
			case 48:
				spifreq = SPI_FREQUENCY_48MHZ;
				break;
			case 50:
				spifreq = SPI_FREQUENCY_50MHZ_30MHZ;
				break;
			default:
				fprintf(stderr, "Invalid SPI Frequency: %d\n",
					inputfreq);
				print_usage(argv[0]);
				exit(EXIT_FAILURE);
			}
			mode_spifreq = 1;
			break;
		case 'e':
			mode_em100 = 1;
			break;
		case 'l':
			mode_locked = 1;
			if (mode_unlocked == 1) {
				fprintf(stderr, "Locking/Unlocking FD and ME are mutually exclusive\n");
				exit(EXIT_FAILURE);
			}
			break;
		case 'u':
			mode_unlocked = 1;
			if (mode_locked == 1) {
				fprintf(stderr, "Locking/Unlocking FD and ME are mutually exclusive\n");
				exit(EXIT_FAILURE);
			}
			break;
		case 'p':
			if (!strcmp(optarg, "aplk")) {
				platform = PLATFORM_APL;
			} else if (!strcmp(optarg, "cnl")) {
				platform = PLATFORM_CNL;
			} else if (!strcmp(optarg, "glk")) {
				platform = PLATFORM_GLK;
			} else if (!strcmp(optarg, "icl")) {
				platform = PLATFORM_ICL;
			} else if (!strcmp(optarg, "jsl")) {
                                platform = PLATFORM_JSL;
			} else if (!strcmp(optarg, "sklkbl")) {
				platform = PLATFORM_SKLKBL;
			} else if (!strcmp(optarg, "tgl")) {
				platform = PLATFORM_TGL;
			} else {
				fprintf(stderr, "Unknown platform: %s\n", optarg);
				exit(EXIT_FAILURE);
			}
			fprintf(stderr, "Platform is: %s\n", optarg);
			break;
		case 't':
			mode_validate = 1;
			break;
		case 'v':
			print_version();
			exit(EXIT_SUCCESS);
			break;
		case 'h':
		case '?':
		default:
			print_usage(argv[0]);
			exit(EXIT_SUCCESS);
			break;
		}
	}

	if ((mode_dump + mode_layout + mode_extract + mode_inject +
		mode_newlayout + (mode_spifreq | mode_em100 | mode_unlocked |
		 mode_locked) + mode_altmedisable + mode_validate) > 1) {
		fprintf(stderr, "You may not specify more than one mode.\n\n");
		print_usage(argv[0]);
		exit(EXIT_FAILURE);
	}

	if ((mode_dump + mode_layout + mode_extract + mode_inject +
	     mode_newlayout + mode_spifreq + mode_em100 + mode_locked +
	     mode_unlocked + mode_density + mode_altmedisable + mode_validate) == 0) {
		fprintf(stderr, "You need to specify a mode.\n\n");
		print_usage(argv[0]);
		exit(EXIT_FAILURE);
	}

	if (optind + 1 != argc) {
		fprintf(stderr, "You need to specify a file.\n\n");
		print_usage(argv[0]);
		exit(EXIT_FAILURE);
	}

	char *filename = argv[optind];
	int bios_fd = open(filename, O_RDONLY | O_BINARY);
	if (bios_fd == -1) {
		perror("Could not open file");
		exit(EXIT_FAILURE);
	}
	struct stat buf;
	if (fstat(bios_fd, &buf) == -1) {
		perror("Could not stat file");
		exit(EXIT_FAILURE);
	}
	int size = buf.st_size;

	printf("File %s is %d bytes\n", filename, size);

	char *image = malloc(size);
	if (!image) {
		printf("Out of memory.\n");
		exit(EXIT_FAILURE);
	}

	if (read(bios_fd, image, size) != size) {
		perror("Could not read file");
		exit(EXIT_FAILURE);
	}

	close(bios_fd);

	check_ifd_version(image, size);

	if (mode_dump)
		dump_fd(image, size);

	if (mode_layout)
		dump_layout(image, size, layout_fname);

	if (mode_extract)
		write_regions(image, size);

	if (mode_validate)
		validate_layout(image, size);

	if (mode_inject)
		inject_region(filename, image, size, region_type,
				region_fname);

	if (mode_newlayout)
		new_layout(filename, image, size, layout_fname);

	if (mode_spifreq)
		set_spi_frequency(filename, image, size, spifreq);

	if (mode_density)
		set_chipdensity(filename, image, size, new_density);

	if (mode_em100)
		set_em100_mode(filename, image, size);

	if (mode_locked)
		lock_descriptor(filename, image, size);

	if (mode_unlocked)
		unlock_descriptor(filename, image, size);

	if (mode_altmedisable) {
		fpsba_t *fpsba = find_fpsba(image, size);
		fmsba_t *fmsba = find_fmsba(image, size);
		fpsba_set_altmedisable(fpsba, fmsba, altmedisable);
		write_image(filename, image, size);
	}

	free(image);

	return 0;
}